In fact, his work is insistently open-ended. Like Goya's Disasters of War, his art queries time and again, "How can this have happened?" Sometimes viewers reply, assaulting pictures of innocent children, worshipping those of a murderous dictator. Yet such reactions can only bring us to inquire again, louder and with greater urgency, "How can this have happened?" At last we recognize that Helnwein asks questions not in order to solicit answers - hate has no reason - but rather in order that we might begin to pose our own.